std::array

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C++ Standard Library
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Containers library
array (C++11) vector deque forward_list (C++11) list set multiset map multimap unordered_set (C++11) unordered_multiset (C++11) unordered_map (C++11) unordered_multimap (C++11) stack queue priority_queue
std::array
Member functions Element access array::at array::operator[] array::front array::back array::data Iterators array::begin array::cbegin array::end array::cend array::rbegin array::crbegin array::rend array::crend Capacity array::empty array::size array::max_size Modifiers array::fill array::swap Non-member functions get swap Helper classes tuple_size tuple_element

Defined in header <array>
template<     class T,     size_t N > struct array;		(since C++11)

array is a container that encapsulates constant size arrays.

This struct is designed to provide the benefits of a standard container (an array knows its own size, supports assignment, random access iterators, etc.) while still providing the aggregate type semantics of C-style arrays.

There is a special case for a zero-length array (N == 0). In that case, array.begin() == array.end(), which is some unique value. The effect of calling front() or back() on a zero-sized array is undefined.

Contents 1 Member types 2 Member functions 2.1 Element access 2.2 Iterators 2.3 Capacity 2.4 Operations 3 Non-member functions 4 Helper classes

[edit] Member types

Member type	Definition
value_type	T
size_type	size_t
difference_type	ptrdiff_t
reference	value_type&
const_reference	const value_type&
pointer	T*
const_pointer	const T*
iterator	Random access iterator
const_iterator	Constant random access iterator
reverse_iterator	std::reverse_iterator<iterator>
const_reverse_iterator	std::reverse_iterator<const_iterator>

[edit] Member functions

Element access
at	access specified element with bounds checking (public member function)
operator[]	access specified element (public member function)
front	access the first element (public member function)
back	access the last element (public member function)
data	direct access to the underlying array (public member function)
Iterators
begin cbegin	returns an iterator to the beginning (public member function)
end cend	returns an iterator to the end (public member function)
rbegin crbegin	returns a reverse iterator to the beginning (public member function)
rend crend	returns a reverse iterator to the end (public member function)
Capacity
empty	checks whether the container is empty (public member function)
size	returns the number of elements (public member function)
max_size	returns the maximum possible number of elements (public member function)
Operations
fill	fill the container with specified value (public member function)
swap	swaps the contents (public member function)

[edit] Non-member functions

std::get(std::array)	accesses an element of an array (function template)
std::swap(std::array)	specializes the std::swap algorithm (function template)

[edit] Helper classes

std::tuple_size<std::array>	obtains the size of an array (class template specialization)
std::tuple_element<std::array>	obtains the type of the elements of array (class template specialization)